Over the same period, the alliance says, Canada's clean-tech sector has also expanded, and its exports are comparable to those of forestry, livestock and mining.

Clean technology is "unequivocally a pillar of the Canadian economy," the group says. However, Canada's share has been eroded, it warns.

Clean technology is 'unequivocally a pillar of the Canadian economy,' the BC Cleantech CEO Alliance says. (Canadian Press)

"In fact, Canada has been the world's third greatest loser of market share for clean-tech solutions since 2008, [with its global ranking] falling from 14th to 19th in terms of total market share as other countries pour investment dollars into pioneering these technologies," the letter says.

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